Type of Subscriber Print + Online Online Only U.S. (Periodicals Class Mail) Individuals $320 $180 Students/Postdocs   n/a   $30 Non-U.S. (Surface Mail) Individuals $505 $180 Students/Postdocs   n/a   $30

*Individual and Student/Postdoc Subscriptions are for personal use only and are not to be used for a library. You must pay by personal check, money order, or credit card, and state that your subscription is for personal use only. Orders from students/postdocs must be accompanied by a letter from your advisor or supervisor, on institutional letterhead, stating that you are enrolled in a program of study leading to a degree or that you are within 4 years of receiving a doctorate.

Note: All prices are in U.S. dollars. Print and online subscriptions are based on a calendar year.

Tier 1^‡
Entry-level pricing for nonresearch public or agency libraries, primary or secondary schools, nonresearch museums, or private practice offices or clinics (onsite access only)

Online Only Online + Print U.S. Online + Print Non-U.S. Additional Print U.S. Additional Print Non-U.S. Print Only U.S. Print Only Non-U.S.  $255  $625  $980  $440  $795  $485  $840

Tier 2
Undergraduate (baccalaureate) and master's colleges/universities, and equivalents

Online Only Online + Print U.S. Online + Print Non-U.S. Additional Print U.S. Additional Print Non-U.S. Print Only U.S. Print Only Non-U.S.  $1,275  $2,175  $2,530  $1,010  $1,365  $1,825  $2,180

Tier 3

Carnegie Research Intensive institutions and their overseas equivalents (<12,000 relevant FTEs^§), research libraries, nonresearch/teaching hospitals, small nonprofit/government research institutes (<5 locations), small corporations (<1,000 relevant FTEs^§)

Online Only Online + Print U.S. Online + Print Non-U.S. Additional Print U.S. Additional Print Non-U.S. Print Only U.S. Print Only Non-U.S.  $2,390  $3,365  $3,720  $1,010  $1,365  $1,825  $2,180

Tier 4

Carnegie Research Extensive institutions and their overseas equivalents (>12,000 relevant FTEs^§), medical schools, research/teaching/network hospitals (eligible for Tier 2 if affiliated medical school purchased Tier 4 license), large nonprofit/government research institutes (5 locations ¶)

Online Only  Online + Print U.S.  Online + Print Non-U.S.  Additional Print U.S.  Additional Print Non-U.S.  Print Only U.S.  Print Only Non-U.S. $3,130 $4,150 $4,505 $1,010 $1,365 $1,825 $2,180

Tier 5

Medium corporations (1,000 - 3,000 relevant FTEs^§)

Online Only Online + Print U.S. Online + Print Non-U.S. Additional Print U.S  Additional Print Non-U.S. Print Only U.S. Print Only Non-U.S. $4,235 $5,325 $5,680 $1,010 $1,365 $1,825 $2,180

Tier 6^‡

Large corporations (>3,000 relevant FTEs^§)

Online Only Online + Print U.S. Online + Print Non-U.S. Additional Print U.S. Additional Print Non-U.S. Print Only U.S. Print Only Non-U.S. $7,070 $8,260 $8,615 $1,010 $1,365 $1,825 $2,180

^†2008 Institutional Site Licenses automatically include Institutional Open Access Membership at no additional charge. Corresponding authors from institutions with 2008 Site Licenses/Open Access Memberships will receive a discounted price of $850, compared to our regular Open Access Fee of $1,200, to make their papers immediately free online.

^‡Very small and very large institutions/corporations (those well below or above the parameters set in the model, such as consortia) please contact PNAS, for prices.

^§Relevant FTE is defined as the researchers, scientists, and other potential users of PNAS.

¶ If greater than five locations, please contact PNAS for multisite prices.

Print PDF version of Pricing Tiers

Expedited Print Delivery Rates

Individual domestic subscribers may purchase expedited delivery service (First Class Mail) for an additional fee of $160. Expedited delivery is not available outside the United States.

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